Global Patent Index - EP 2085744 A4

EP 2085744 A4 20150603 - DISTANCE MEASURING DEVICE, METHOD, AND PROGRAM

Title (en)

DISTANCE MEASURING DEVICE, METHOD, AND PROGRAM

Title (de)

ABSTANDSMESSVORRICHTUNG, -VERFAHREN UND -PROGRAMM

Title (fr)

DISPOSITIF, PROCÉDÉ ET PROGRAMME DE MESURE DE DISTANCE

Publication

EP 2085744 A4 20150603 (EN)

Application

EP 07860068 A 20071225

Priority

  • JP 2007074839 W 20071225
  • JP 2006347777 A 20061225

Abstract (en)

[origin: US2010046801A1] A depth distance of a target point for measurement can be found by exploiting the equality of a cross ratio of phases of reference data points and a target point for measurement to a cross ratio of depth distances of these points. The depth distance of the target point for measurement can also be determined by exploiting the equality of a cross ratio of the distances among a set of projection points corresponding to projection of reference data points and a target point on a reference plane; of a cross ratio of distances among a set of image projection points corresponding to projection of a set of projection points on an image; and of a cross ratio of distances of a set of points which are equiphase to a set of image projection points on an arbitrary straight line on an image, respectively, relative to the cross ratio of the depth distances.

IPC 8 full level

G01S 17/46 (2006.01); G01C 3/08 (2006.01); G01S 17/89 (2020.01)

CPC (source: EP US)

G01C 3/08 (2013.01 - EP US); G01S 17/46 (2013.01 - EP US); G01S 17/89 (2013.01 - EP US)

Citation (search report)

  • [A] EP 0431191 A1 19910612 - FUJITSU LTD [JP]
  • [A] WO 9009561 A2 19900823 - TSIKOS CONSTANTINE J [US]
  • [A] ZHOU F ET AL: "Complete calibration of a structured light stripe vision sensor through planar target of unknown orientations", IMAGE AND VISION COMPUTING, ELSEVIER, GUILDFORD, GB, vol. 23, no. 1, 1 January 2005 (2005-01-01), pages 59 - 67, XP027617845, ISSN: 0262-8856, [retrieved on 20050101]
  • [A] WEI Z ET AL: "3D coordinates measurement based on structured light sensor", SENSORS AND ACTUATORS A, ELSEVIER SEQUOIA S.A., LAUSANNE, CH, vol. 120, no. 2, 17 May 2005 (2005-05-17), pages 527 - 535, XP027806928, ISSN: 0924-4247, [retrieved on 20050517]
  • [A] SALVI J ET AL: "An overview of the advantages and constraints of coded pattern projection techniques for autonomous navigation", INTELLIGENT ROBOTS AND SYSTEMS, 1997. IROS '97., PROCEEDINGS OF THE 19 97 IEEE/RSJ INTERNATIONAL CONFERENCE ON GRENOBLE, FRANCE 7-11 SEPT. 1997, NEW YORK, NY, USA,IEEE, US, vol. 3, 7 September 1997 (1997-09-07), pages 1264 - 1271, XP010264805, ISBN: 978-0-7803-4119-7, DOI: 10.1109/IROS.1997.656407
  • [A] TSALAKANIDOU ET AL: "Real-time acquisition of depth and color images using structured light and its application to 3D face recognition", REAL-TIME IMAGING, ACADEMIC PRESS LIMITED, GB, vol. 11, no. 5-6, 1 October 2005 (2005-10-01), pages 358 - 369, XP005074682, ISSN: 1077-2014, DOI: 10.1016/J.RTI.2005.06.006
  • See references of WO 2008078744A1

Designated contracting state (EPC)

DE FR GB

DOCDB simple family (publication)

US 2010046801 A1 20100225; US 8265343 B2 20120911; EP 2085744 A1 20090805; EP 2085744 A4 20150603; EP 2085744 B1 20161123; JP 5029618 B2 20120919; JP WO2008078744 A1 20100430; WO 2008078744 A1 20080703

DOCDB simple family (application)

US 44355107 A 20071225; EP 07860068 A 20071225; JP 2007074839 W 20071225; JP 2008551117 A 20071225